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higher flows diverted around the swale. The swale should be <br />designed per the following criteria for the 2 year, 24-hour <br />storm: <br />"n" = 0.12 <br />max velocity = 1.5 feet per second <br />max. depth = 0.5 feet <br />The entire contributing area must be used in calculating the <br />cross-sectional area of the swale. Only the site's paved <br />area must be used in determining the required length of <br />swale. <br />The following information regarding the vegetated swale must <br />be submitted for review and approval: <br />1) design flow calculation <br />i) velocity and flow depth calculations <br />3) bypass sizing calculations <br />4) copy of site plan showing the contributing area <br />5) calculation of the length of swale required <br />PLAN REVIEW COMMENTS <br />Veqetated swales: <br />The swale construction notes and swale planting/seeding <br />✓ requirements must be shown on both the landscaping plan and <br />the storm drainage plan. <br />The berm between the pond and the swale should be widened to <br />L� 5 feet and graveled, so that it can serve as an access path <br />to the swale for maintenance. * <br />8urface Pond• <br />All ponds with a maximum depth greater than three feet-ara_� <br />requ.ired to be fenced with a=six_foot high-perimeter-fence <br />unless one of the following conditions is met: <br />1) a 10 faot wide safety bench for every three feet of <br />design water depth and the side slopes of the pond are no <br />greater than 3:1 (H:V); or <br />2) the maximum water depth of the facility does not exceed <br />three feet during a two year storm, nor exceed three feet <br />for more than four hours for a 25 year storm; the side <br />slopes are a maximum of 3:1 (H:V); and the facility is a <br />dual use facility; or <br />